Method of treating crevices in roads, buildings, and the like



Oct. 28 1924. 1,513,382

A. C. F'lSCHER METHOD OF TREATING CREVICES IN RCADS, BUILDINGS, AND THE LIKE Filed Sept. 11, 1922 Patented Oct. 2 8, 1924. I

UNITED STATES ALBERT G. FISCHER, OF CHICAGO, ILLINOIS.

METHOD OF TREATING CREVICES IN ROADS, BUILDINGS, AND THEIJIKE.

Application filed September 11, 1922. Serial No. 587,612.

To all whom it may concern:

Be it known that I, ALBERT C. FISCHER, a citizen of the United States, residing in Chicage, county of Cook, State of Illinois, have invented a certain new and useful Improvement in Methods of Treating Crevices in Roads, Buildings, and the like, of which the following is a specification, reference being had to the accompanying drawing, illustrating a method of practicing the invention in connection with a concrete pavement, which is shown in section in the plane of a crevice or separation between two sections of the pavement.

In said drawing, 1 represents a road bed, 2 the surface paving laid thereon, and 3 a crevice in such surface paving or a dividing space between separately laid sections thereof. The bellows 4=is suggestive of some suitable means for dusting into the crevice 3 a powdered substance having the capacity for reacting under the application of heat and giving off a gas, such, for instance, as sodium icarbonate mixed with powdered gypsum, and in which mixture the sodium bicarbonate constitutes the principal reactive agent while the gypsum serves mainly as a vehicle for the reactive[ agent. The area 5 is suggestive of the deposit of the gas-producing powder upon the bottom and sides of the crevice. The pouring container 6 is ty ical of any means for supplying to the crevice 3 a filling body of melted asphalt at a relatively high temperature, andwhich, according to the present invention, is to be poured into the crevice 3 until the latter is filled and sealed in a manner to thoroughly exclude moisture from the space. As a result of pouring'liot asphalt into the crevice 3, after the gas-generating powdered substance 5 has been introduced, a crevice filling body 7 of asphalt is produced having a highly developed cellular or spongy structure that secures the advantages hereinafter set forth.

My invention relates primarily to the treatment of crevices in concrete roads, but is not necessarily confined to this use as any crevice which it is desirable to fill, make waterproof or vermin proof, can be'treated in the same manner.

Roof flashings, leaks and other like troubles may be overcome with my method of crevice treating, and, as far as I am aware, is entirely new and unique.

I have found that in creating sponge asphalt a carbonated powder, coming in contact with the heated liquid bituminous matter, causes it to foam and swell, crowdin itself into any crevices or niches open be ow, thus forcing itself into all niches and corners.

In attempting to pour the heated liquid into the crevice, it will continue its course, chilling as it travels, settling to a solid obstacle to further penetration. In my crevicetreating method, however, the contact with the powder causes the heated liquid to foam and spread itself in all directions, crowding itself into every opening.

The crevice is treated by blowing into it bi-carbonated powder with a bellows, following this treatment with the heated liquid bituminous material.

Various forms of chemicals may be used to produce the same result, but it is preferable to use a combination of bi-carbonate of soda and carrying body of dry powder readily dusted, such as talc, gypsum, etc., so that the dust will readily spread in all directions,

I claim:

1. The method of treating crevices in structures, which consists in filling such crevices with a moldable substance in'the presence of a gas-generating substance capable of expandlng the filling.

2. The method of treating crevices in structures, which consists in filling such crevices with a moldable substance in the presence of a gas-generating substance capable of expanding the filling, and developing a highly porous physical condition therein.

3. The improvement in the method of fill- 'ing crevices in structures, which consists in crevice an asphaltic filling material in the presence of-a substance containing bicarbonate of soda.

'6. The improvement in the art of filling crevices, which consists in pouring into the carrying the gas producing chemicals with crevice a plastic filling material in the presence of bicarbonate of sodium and a vehicular materialin the form of dust.

7 The improvement in the art of filling 5 crevices, which consists in first applying a Lsiaeea ing substance and releasing gas therefrom.

8. The method of filling a crevice, which W consists in pouring a filling material thereinto and expancling saiol material after it is in the crevice.

Signed at Chicago, Illinois, this 9th &ay of September, A. 1D. 1922.

ALBERT C. FISCHER. 

